Astronomers spot 'radio phoenix' shaped like a treble clef 1.6 billion light-years away

Behind the dusty plane of the Milky Way, astronomers found a tangle of radio light nicknamed the Treble Clef inside merging galaxy clusters. It is a 'radio phoenix' — faded particles from a black hole's jets reignited by the collision. The cluster lies about 1.6 billion light-years away and weighs roughly 600 trillion suns.

• Object visible only in radio: LOFAR and India's GMRT resolved thin filaments
• Distance to the cluster is about 1.6 billion light-years
• Cluster mass is roughly 600 trillion times the sun
• NASA's Chandra and Germany's eROSITA confirmed the ongoing merger